Valentin jakob odbztee



v V. I. ODHNER.

ARRESTING MEANS FOR THE SHIFTING CRANKS 0F CALCULATING MACHINES. APPLICATION FILED AUG-22, H9.

1 3 99 5 Patented D60. 6, 1921 Inventor II. J. OtZI'IJZGZ' VALENTIN JAKOB ODHNER, 0F GOTTENBORG, SWEDEN.

ABRESTING MEANS FOR THE SHIFTING-CRANKS OFCALCULATING- MACHINES.

Specification of Letters Patent.

Patented Dec. 6, 1921.

Application filed August 22, 1919. Serial No. 319,219.

To all whom it may concern:

Be it known thatI, VALENTIN JAKon ODH- NER, a subject of theKin of Sweden, and resident of Vasaplatsen 1, aottenborg, in the Kingdom of Sweden, have invented certain new and useful Improvements in Arresting Means for the Shifting-Cranks of Calculating-Machines, of which the followingis a specification, reference beinghad therein to the accompanying drawings.

In calculating machines hitherto used and provided with calculating wheels and a crank for the rotating of the same a spring actuated rod is slidably mounted in the said crank, which by pulling the handle longitudinally is disengaged from a recess provided in a projection on the frame of the machine and holding the crank in the zero position. The said arresting means has many disadvantages. Thus the end of the rod strikes the said projection as the crank arrives to the zero-position or passes the same, if no special attention is paid to the keeping of the rod in its inactive position, until the crank is opposite to the said projection or while it is moved past the same, which very seldom is the case owing to the uncomfortable manner in which the rod must be held in the withdrawn position. The consequence is, that a groove is worn in the projection, so that after a time the arresting device does not functionate. Means has been pro posed, which hold the spring actuated rod in inactive position but the releasing of which requires a special manipulation. A further disadvantage of the machines hitherto used consists in the necessity of paying a special attention to the stopping of the crank in the zero-position. The present invention relates to an arresting device, in which the said disadvantages are removed.

According to the invention the arresting device is disengaged by means of lever arms extendin longitudinally of the handle of the crank and movable transversally of the same, which by means of cams actuate the arresting device when the handle is grasped. Owing to the said arrangement the arresting device may be shifted and held in its inactive position in a very convenient manner.

In the accompanying drawings Figure 1 is a longitudinal sectional view of an arresting mechanism constructed in accordance with the invention. Fig. 2 is a sectional view on the line 2-2 of Fig. 1. Fig. 3 is a detail.

In the invention shown the handle itself is adapted to disengage the arresting piece or rod. For that purpose the handle is dlvlded into two halves 35, 36, which at 37 are hinged to a sleeve 38. The said sleeve 1s rotatably mounted on a hollow stud 39 extendlng from the crank 4 and is kept on the same by a disk 40, fixed in the said stud 39. The arresting piece or rod 41 is slidably mounted in the stud 39 and acted upon b a spring 42, hearing against the disk 40 and the enlarged outer end portion 43 of the rod 41. The said end portion of the rod 41 is wedge shaped and engages a correspondingly shaped notch in the projection 2 of the frame of the machine. On the inner s 1de of the parts 35, 36 respectively a proectlon 44 is provided. As the handle is grasped and the parts 35, 36 are forced toward one another, the beveled inner ends of the said projections 44 actuate a cam or wedge shaped piece 45, fixed to the rod 41 111 such manner, that the rod is forced against the action of the spring 42, outward and disengaged from the projection 2. As the handle is released, the rod 41 is forced lnto engagement with the projection 2 and the parts returned to the shown posit-ion by the spring 42. The outward swinging of the halves 35, 36 is limited by the surfaces 35 and 36* provided on the same and abutments 46, provided on the crank. While the crank is rotated and the handle 35, 36 turns around the stud 39, the rod 41 is caused to partake in the rotary motion of the handle by the projectlons 44 engaging slots 47 provided in the plece 45.

In the invention, the arresting device may easily be disengaged and held in disengaged position and no pulling in the handle longitudinally of the same must be effected, as is the case in machines of the construction hitherto used. The arresting rod or piece is released only when the crank is released, owing to which fact the said rod or piece has no opportunity of striking the projection of the frame, while the crank is rotated through a plurality of revolutions.

The invention may, evidently, be modified in many respects without exceeding the limits of the same.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a calculating machine, the combination with a shifting crank, of an arresting device for said crank, comprising a stationary notch or the like, an arresting piece, a handle divided into a plurality of parts, a cam mechanism provided between the said parts, actuated by said parts and operatively connected wlth said arresting piece for disengaging the arresting piece from the notch When the handle is grasped.

2. In a calculating machine, the combination With a shifting crank, of an arresting device for the said crank comprising a stationary notch or the like, a spring actuated arresting piece, a handle divided into a plurality of parts a sleeve rotatably mounted on the crank, means oivotally connecting the said parts with said sleeve, projections on the inner sides of said parts, and a cam piece provided on the arresting piece and actuated by the said projection for disengaging the arrestin piece from the notch when the handle is rasped.

In Witness Whereo I have hereunto signed my name.

VALENTIN JAKOB ODHNER. 

